How to Read JSON data from txt file in Java?

I am now want to read a series of JSON data(Nodes data) from local txt file(shown below, NODES.txt ). I use javax.json to do this.

Currently, I have a Node class which contains the attributes:type, id, geometry class(contains type, coordinates), properties class (contains name);

Here is the data I need to retrieve, it contains more than 500 nodes in it, here I just list 3 of them, so I need to use a loop to do it, I am quite new to this, please help !!

The sample JSON data in NODES.txt

[
 {
   "type" : "Feature",
   "id" : 8005583,
   "geometry" : {
    "type" : "Point",
    "coordinates" : [
     -123.2288,

     48.7578
    ]
   },
   "properties" : {
    "name" : 1
   }
  },
  {
   "type" : "Feature",
   "id" : 8005612,

   "geometry" : {
    "type" : "Point",
    "coordinates" : [
     -123.2271,
     48.7471
    ]
   },
   "properties" : {
    "name" : 2
   }

  },
  {
   "type" : "Feature",
   "id" : 8004171,
   "geometry" : {
    "type" : "Point",
    "coordinates" : [
     -123.266,
     48.7563
    ]

   },
   "properties" : {
    "name" : 3
   }
  },
     ****A Lot In the Between****
{
   "type" : "Feature",
   "id" : 8004172,
   "geometry" : {

    "type" : "Point",
    "coordinates" : [
     -113.226,
     45.7563
    ]
   },
   "properties" : {
    "name" : 526
   }
  }

]

Answer

Create classes to represent the entries:

Feature.java:

import java.util.Map;

public class Node {

    public String type;
    public String id;
    public Geometry geometry;
    public Properties properties;
}

Geometry.java:

import java.util.List;


public class Geometry {
    public String type;
    public List coordinates;
}

Properties.java:

public class Properties {

     public String name;
}

And an application main class to drive the processing.

Main.java:

import com.google.gson.Gson;
import java.io.FileReader;

import java.io.Reader;

public class Main {
    public static void main(String[] args) throws Exception {
        try (Reader reader = new FileReader("NODES.txt")) {
            Gson gson = new Gson();
            Node[] features = gson.fromJson(reader, Node[].class);
             // work with features
        }
    }

}